Carnes EFOA Installation Manual
FORM 40003
INSTALLATION, OPERATING AND MAINTENANCE INSTRUCTIONS
Models EFOA and EGOA Combination Fire/Smoke Dampers
CAUTION! DO NOT INSTALL, USE OR OPERATE THIS EQUIPMENT UNTIL THIS
MANUAL HAS BEEN READ AND UNDERSTOOD. READ AND SAVE THESE INSTRUCTIONS FOR FUTURE USE.
When UL is referred to in this document, it represents UL/ULC.
1. 18 gauge galvanized steel integral sleeve shall
be of the SAME GAUGE or heavier as the duct
to which it is attached. Gauges shall conform to
SMACNA or ASHRAE duct standards. The
length of the sleeve extending beyond the wall
opening shall not exceed 16” (406mm) on the
operator side or 6” (152mm) on the opposite side.
2. The connecting duct shall terminate at the integral sleeve and is connected by using
either:
A. A minimum of three #10 sheet metal screws spaced equidistant around the sleeve
for 22” and smaller duct.
B. A minimum of five #10 sheet metal screws spaced equidistant around the sleeve
for greater than 22” duct.
C. A 4” (101mm) drawband.
3. Clearance between the damper sleeve and the round or square wall opening shall be
a minimum of 1/2” (13mm) and a maximum of 1” (25mm).
4. Damper will be factory supplied with one retaining plate secured to the damper sleeve
on the operator side of the damper.
5. A minimum of 4 equally spaced 20 gauge galvanized steel clip angles shall be
attached to both the integral sleeve and the retaining plate. The clip angles shall be
attached with 1/8” (3mm) rivets, #10 by 1/2” (13mm) sheet metal screws, bolts, or
welds. In metal stud/gypsum applications, the retaining plate may be in front of or
behind the gypsum, directly against the metal studs.
6A. Option 1: The damper may be installed in a wood/gypsum, steel stud/gypsum, or
masonry fire partition in the vertical or horizontal position (blade shaft running
horizontal) with a retaining plate flush against each side of the fire partition.
Installation: with the factory installed retaining plate flush to the fire partition, place
another retaining plate on the opposite side of the damper sleeve and slide it forward
until it becomes flush with the opposite side of the partition. Place the Splice Clip over
the cut partition of the retaining plate. Secure it with four #10 sheet metal screws or
rivets. Secure the clip angles to the retaining plate and damper sleeve as illustrated.
FORM 40003, page 1
CARNES COMPANY 448 S. Main St., P. O. Box 930040, Verona, WI 53593-0040 Phone: (608)845-6411 Fax: (608)845-6470 www.carnes.com
OPTION 1: ANGLES 2 SIDES
Typical wood, metal stud, or masonry opening.
(Refer to metal or wood stud framing for
fire dampers in drywall partitions.)
8
4
1
6A
3
4
5
Blade
Shaft
Auxiliary
Operating
Jackshaft
OPTION 1
Cross section of opening.
1” Min. Typ.
(25mm)
OPTION 1
NOTE: CAUTION HEAVY SPRING
USED TO LOAD SPRING/LINK
ACTUATOR USE CARE IN
RESETTING LINK.
IMPORTANT
Do Not Cast Damper In Place.
Cycle Damper After Installation To Insure Free Movement.
Do Not Install Damper Out Of Round.
Retaining Plate Detail
All dimensions
in inches.
A and B = Damper
Dia. plus 3” (76mm)
Cut (Cover with
Splice Clip)
D
2
+ 1-1/2”
(38mm)
B
2
D
A
B
OPTION 1
UL APPROVED WALL
OR FLOOR DESIGN
Retaining
Plate
Fastener
Clip
Angle
Damper
Sleeve
Wall or Floor Detail
Clip Angle Detail
20 Ga. (1) Galv. Steel
Splice Clip Detail
Same length as
cut in damper/
retaining plates
1-1/2”
(38mm)
1-1/2”
(38mm)
1-1/2”
(38mm)
1-1/2”(38mm)
Manufacturer’s Recommendations
All moving parts of the damper must be inspected and cycled at intervals not greater than every 12 months or in accordance with the
latest edition of NFPA 90A, 92A, local codes, and the actuator manufacturer. In addition, fuse links shall be removed and inspected for
corrosion. Dry lubricants are recommended.
This installation sheet has been reviewed and accepted by Underwriters Laboratories.
When UL is referred to in this document, it represents UL/ULC.
FORM 40003, page 2
6B. Option 2: The damper may also be installed in a steel stud/gypsum or masonry
partition, in a vertical or horizontal (retaining plate on top) position (blade running
horiztontal), with a retaining plate on one side of the partition. Installation: with the
factory installed retaining plate flush to the fire partition, place eight screws (#10
sheet metal for steel studs long enough to penetrate the metal stud by 1/2” minimum
or #10 by 1-1/4” masonry screws) equidistant around the perimeter of the retaining
plate. Screws are placed in each corner and halfway between the corners as shown.
7. Electrical and/or pneumatic connections to damper actuators should be made in
accordance with wiring and piping diagrams developed in compliance with applicable
codes, ordinances, and regulations.
8. Refer to the installation instruction for Drywall Type Construction for the material and
opening framing details.
9. As with all joints, the contractor must seal duct-collar connections, in the field, after
installation.
OPTION 2
Retaining Plate Detail
Cutline on
Retaining
Plate
(Cover with
Splice Clip)
OPTION 2: ANGLE 1 SIDE
Typical wood, metal stud, or masonry opening.
(Refer to metal or wood stud framing for
fire dampers in drywall partitions.)
8
4
1
6B
3
4
5
Blade
Shaft
Auxiliary
Operating
Jackshaft
OPTION 2
Cross section of opening.
1” Min. Typ.
(25mm)
5
OPTION 2
STEEL STUD OR MASONRY
WALL UL DESIGN
Retaining
Plate
Fastener
Wall Detail
Clip Angle Detail
20 Ga. (1) Galv. Steel
Splice Clip Detail
Same length as
cut in damper/
retaining plates
1-1/2”
(38mm)
1-1/2”
(38mm)
1-1/2”
(38mm)
1-1/2”(38mm)
Clip Angle
Fastener
Damper
Sleeve
6B
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